Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9f08f7bf4fd0cf…

MALICIOUS

PDF

65.1 KB Created: 2021-02-20 10:52:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ca2f713938c1e8591e76f2d40c4e64a2 SHA-1: 10b81481e5f32acbc90578c9ff2084fd4d5c97a5 SHA-256: 5b9f08f7bf4fd0cf64fcde90c7ac4ddd0e1cdd25f533bb4f28764ad981fb1027
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/strik?utm_term=java+8+stream+convert+list+to+map PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388050/normal_60141fb79f8a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447098/normal_5ff9204ca007f.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/hcQyFQa/14000049812.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/dqLewLa/30741840796.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/Od3iaib/41299259270.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/BJhijc3/pokemon_tv_app_download_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazovugal/dokad.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/89704724060.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/granny_mod_menu_apk_1._7.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/happy_birthday_to_u_original_song.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/54644439616.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/50592798878.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/baxi_solo_3_pfl_50_boiler_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/madinatenus.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/client_satisfaction_survey_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/ziwodamutisesalibawodaler.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/critical_ops_apk_gameplay.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A4 5320 bytes
SHA-256: a8b176f117eaa0996b8d2f92c0a435e47a060af973d8c58e1e24765366c6064b
font_01_sfnt_off0000d2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AE 10624 bytes
SHA-256: 1e0e851ae6932cd39b27a991a0fdf08913fa47ea3c205d38a50cbae01ed252cf

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